*{margin:0;padding:0;}
#pingfen{ width:140px;margin:10px auto;height:28px;}
#pingfen li{ width:14px;float:left;height:28px; cursor:pointer;background:url(star.gif) no-repeat 0 0; list-style:none;}
#pingfen li.odd {background: url(star.gif) no-repeat -14px 0px;}
/*#pingfen li:nth-child(2n) {background: url(star.gif) no-repeat -14px 0px;}*/